From: Aristeu Rozanski <aroza...@redhat.com>
flex_array currently is built unconditionally:
text data bss dec hex filename
2294 1008 1568 4870 1306 lib/flex_array.o
2294 1008 1568 4870 1306 (TOTALS)
and it's used by procfs, selinux and openvswitch. This patch is
useful for situations in which memory footprint is a concern and
those features aren't used.
Cc: Changli Gao <xiao...@gmail.com>
Cc: Dave Hansen <d...@linux.vnet.ibm.com>
Cc: David Rientjes <rient...@google.com>
Cc: Eric Paris <epa...@redhat.com>
Cc: Hannes Frederic Sowa <han...@stressinduktion.org>
Cc: Jesse Gross <je...@nicira.com>
Cc: Jonathan Corbet <cor...@lwn.net>
Cc: Paul Gortmaker <paul.gortma...@windriver.com>
Cc: Pravin Shelar <pshe...@nicira.com>
Cc: Alexander Viro <v...@zeniv.linux.org.uk>
Cc: Josh Triplett <j...@joshtriplett.org>
Signed-off-by: Aristeu Rozanski <aroza...@redhat.com>
---
fs/proc/Kconfig | 1 +
lib/Kconfig | 10 ++++++++++
lib/Makefile | 3 ++-
net/openvswitch/Kconfig | 1 +
security/selinux/Kconfig | 1 +
5 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
index 2183fcf..2d624b7 100644
--- a/fs/proc/Kconfig
+++ b/fs/proc/Kconfig
@@ -1,6 +1,7 @@
config PROC_FS
bool "/proc file system support" if EXPERT
default y
+ select FLEX_ARRAY
help
This is a virtual file system providing information about the status
of the system. "Virtual" means that it doesn't take up any space on
diff --git a/lib/Kconfig b/lib/Kconfig
index 54cf309..675920b 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -432,6 +432,16 @@ config GLOB_SELFTEST
module load) by a small amount, so you're welcome to play with
it, but you probably don't need it.
+config FLEX_ARRAY
+ bool "Flexible array"
+ default n
+ help
+ This option enables an implementation of flexible arrays which
+ allows creating arrays of fixed size elements with an arbritrary
+ size without requiring the single allocation of a contiguous area.
+
+ See Documentation/flexible-arrays.txt
+
#
# Netlink attribute parsing support is select'ed if needed
#
diff --git a/lib/Makefile b/lib/Makefile
index 7512dc9..9c12cbc 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -24,7 +24,7 @@ obj-y += lockref.o
obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \
- gcd.o lcm.o list_sort.o uuid.o flex_array.o iovec.o clz_ctz.o \
+ gcd.o lcm.o list_sort.o uuid.o iovec.o clz_ctz.o \
bsearch.o find_last_bit.o find_next_bit.o llist.o memweight.o kfifo.o \
percpu-refcount.o percpu_ida.o hash.o rhashtable.o
obj-y += string_helpers.o
@@ -35,6 +35,7 @@ obj-$(CONFIG_TEST_LKM) += test_module.o
obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o
obj-$(CONFIG_TEST_BPF) += test_bpf.o
obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o
+obj-$(CONFIG_FLEX_ARRAY) += flex_array.o
ifeq ($(CONFIG_DEBUG_KOBJECT),y)
CFLAGS_kobject.o += -DDEBUG
diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig
index ba3bb82..1d979ce 100644
--- a/net/openvswitch/Kconfig
+++ b/net/openvswitch/Kconfig
@@ -5,6 +5,7 @@
config OPENVSWITCH
tristate "Open vSwitch"
select LIBCRC32C
+ select FLEX_ARRAY
---help---
Open vSwitch is a multilayer Ethernet switch targeted at virtualized
environments. In addition to supporting a variety of features
diff --git a/security/selinux/Kconfig b/security/selinux/Kconfig
index bca1b74..cfcc7c1 100644
--- a/security/selinux/Kconfig
+++ b/security/selinux/Kconfig
@@ -2,6 +2,7 @@ config SECURITY_SELINUX
bool "NSA SELinux Support"
depends on SECURITY_NETWORK && AUDIT && NET && INET
select NETWORK_SECMARK
+ select FLEX_ARRAY
default n
help
This selects NSA Security-Enhanced Linux (SELinux).
--
1.8.3.1
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